E E B - -F F -D D ' B 1 2 0026 (1) What is the minimal number of subtree pruning-and-regrafting (SPR) opera- tions needed to change tree 1 into tree 2? Describe the required operations. Yra 2 ob of V8191 Lliw uov 2016 of 915 9lqoe (2) What is the minimal number of nearest-neighbor interchanges (NNIS) needed to change tree 1 into tree 2? Describe one such minimal sequence. E E B - -F F -D D ' B 1 2 0026 (1) What is the minimal number of subtree pruning-and-regrafting (SPR) opera- tions needed to change tree 1 into tree 2? Describe the required operations. Yra 2 ob of V8191 Lliw uov 2016 of 915 9lqoe (2) What is the minimal number of nearest-neighbor interchanges (NNIS) needed to change tree 1 into tree 2? Describe one such minimal sequence